Move static radio_mem to rust

radio.c

@@ -69,8 +69,6 @@ void set_active_device(radio_device_t* d) {
   active_device = d;
 }
 
-unsigned char radio_mem [1024*1024*2];  // Radio memory contents, up to 2 Mbytes
-
 //
 // Read the configuration from text file, and modify the firmware.
 //

src/radio.rs

@@ -31,6 +31,10 @@ static mut RADIO_TABLE: [(&'static str, &'static radio_device_t); 16] = unsafe {
   ]
 };
 
+// Radio memory contents, up to 2 Mbytes
+#[no_mangle]
+pub static mut radio_mem: [u8; 1024*1024*2] = [0; 1024*1024*2];
+
 extern {
 
   fn get_active_device() -> *const radio_device_t;